<template>
   <!-- 头部区域 -->
    <el-container class="home-container">
        <el-header >
            <span>电商后台管理系统</span>
            <!-- 退出按钮 -->
        <el-button type='info' @click='logout' style="background-color: white;color: black; border: none;">
                 退出
        </el-button>
        </el-header>
        <!-- 页面主体区 -->
        <el-container>
            <!-- 侧边栏 -->
          <el-aside :width="isCollapse ? '64px' : '200px'">
              <!-- 侧边栏菜单区域 -->
    <el-menu  background-color="#333744" text-color="#fff" active-text-color="#ffd04b" unique-opened :collapse='isCollapse' :collapse-transition='false' router
    :default-active='activePath'> 
           <!-- 一级菜单 -->
        <el-submenu :index="item.id + ' '" v-for='item in menulist' :key='item.id'>
            <!-- 一级菜单的模板区域 -->
              <template slot="title">
                  <!-- 图标 -->
                <i :class="iconsObj[item.id]"></i>
                <!-- 文本 -->
                <span>{{item.authName}}</span>
              </template>
<!-- 二级菜单 -->
<el-menu-item :index="'/'+ subItem.path" v-for='subItem in item.children' :key='subItem.id' @click="saveNavState('/'+ subItem.path)">
    <template slot="title">
                    <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{subItem.authName}}</span>
                </template>
</el-menu-item>

</el-submenu>

</el-menu>
</el-aside>
<!-- 隐藏按钮 -->
<div class="hide" style="left: 200px;">
    <div :class="className" @click='hide()'></div>
</div>
<!-- 右侧内容主体 -->
<el-main>
    <router-view></router-view>
</el-main>
</el-container>
</el-container>
</template>

<script>
    export default {
        data() {
            return {
                // 左侧菜单数据
                menulist: [],
                iconsObj: {
                    '125': 'el-icon-user-solid',
                    '103': 'el-icon-star-on',
                    '101': 'el-icon-s-goods',
                    '102': 'el-icon-s-order',
                    '145': 'el-icon-s-data'
                },
                isCollapse: false,
                className: 'el-icon-d-arrow-left',
                // 被激活的链接地址
                activePath: ''
            }
        },
        created() {
            this.getMenList()
            this.activePath = window.sessionStorage.getItem('activePath')
        },
        methods: {
            // 点击事件实现退出功能
            logout() {
                // 1.首先清空session中的token值
                window.sessionStorage.clear()
                    // 2.再将路由重定向到登录页面
                this.$router.push('/login')
            },
            // 获取所有的菜单数据
            async getMenList() {
                const {
                    data: res
                } = await this.$http.get('menus')
                if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
                this.menulist = res.data
                console.log(res);
            },
            // 点击按钮，折叠菜单
            hide() {
                this.isCollapse = !this.isCollapse
                console.log(this.isCollapse);
                var hide = document.querySelector('.hide')
                if (this.isCollapse) {
                    hide.style.left = '64px'
                    this.className = 'el-icon-d-arrow-right'
                } else {
                    hide.style.left = '200px'
                    this.className = 'el-icon-d-arrow-left'


                }
            },
            // 保存链接的激活状态
            saveNavState(activePath) {
                window.sessionStorage.setItem('activePath', activePath)
            }

        }

    }
</script>

<style lang="less" scoped>
    .home-container {
        height: 100%;
    }
    
    .el-header {
        background-color: #d7380f;
        display: flex;
        justify-content: space-between;
        align-items: center;
        color: #ffff;
        font-size: 20px;
        >span {
            margin-left: 15px;
        }
    }
    
    .el-aside {
        background-color: #333744;
        .el-menu {
            border-right: none;
        }
    }
    
    .el-main {
        background-color: #eaedf1;
    }
    
    .hide {
        margin-top: 120px;
        position: fixed;
    }
    
    .hide>div:hover {
        background-color: #c7c7c7;
        color: #333744;
    }
    
    .hide>div {
        color: rgb(179, 179, 179);
        width: 20px;
        height: 40px;
        background-color: #333744;
        font-size: 10px;
        position: relative;
        text-align: center;
        line-height: 40px;
        border-radius: 0 30px 30px 0;
    }
</style>